Carry over mechanism for



June 1951 w. WOCKENFUSS CARRY OVER MECHANISM FOR TABULATORS Ongmal FlledMarch 4 1948 INVENTOR- Mllzazn ma P/AV Patented June 19, 1951 CARRY OVERMECHANISM FOR- TABULATORS William Wockenfuss, Union, N. J., assignor toControl Instrument Company, Inc., Brooklyn, N. Y., a corporation of NewYork Original application Mar 1949, Serial No. 104,986

3 Claims. 1

This invention relates to improvements in tabulators and has particularreference to a carry over mechanism therefor, the present applicationbeing a division of my co-pending application Serial No. 13,017, filedMarch 4, 1948.

An object of the invention is to provide an improved carry overmechanism of simple and practical construction wherein a movable slidemember controlled by the accumulator of one type bar is operable therebyto release the accumulator rack of the type bar of higher order so thatsaid rack will carry one into its accumulator wheel,

The above and other objects will appear more clearly from the followingdetailed description when taken in connection with the accompanyingdrawing; but it is to be expressly understood that said drawing is usedmerely for the purpose of facilitating the description of the inventionas a whole and not to define the limits thereof, reference being had tothe appended claims for this purpose.

In the drawing:

' Fig. 1 is a fragmentary isometric view, partly in section, of a carryover mechanism constructed in accordance with the invention; and

Fig. 2 is a fragmentary elevation of a type bar and its accumulatorrack, the latter being shown in carry over position.

In Fig. 1, two of a plurality of type bars I41 are fragmentarily shownas detachably connected at 324 to the lower sections 325 thereof which,in their lowered positions, rest upon and depress the spring urgedplungers 326 mounted in a stationary member 321 so that said plungerswill impart an initial impetus to the type bars at the beginning oftheir upward movement toward printing position. The lower end of thesection 325 of each type bar is engaged by one end of an operating arm328 which is controlled, in the manner described in the above identifiedparent application, to raise and lower the type bars.

The carry over unit embodying the features of the present inventioncomprises a stationary frame 442 mounted on the back of the tabulatingmachine in proximity to and across the bank of accumulators I 52 whichinclude the alternatively operable subtract and add wheels 343 and 344.In said frame are'mounted the carry over slides 443, only one of whichis shown for purposes of clarity, and each of which is yieldably urgedinwardly by a spring 444 with each slide having its inner end disposedbetween the accumulator rack 366 of the illustrated accumulator E92 andthe adjacent type bar (not shown) of the next higher order so as to becontrolled by its asso ch 4, 1948, Serial No. Divided and thisapplication July 15,

ciated accumulator and, in turn, control the accumulator rack of saidadjacent type bar. This control involves either the arresting of saidhighor order rack in its zero position (Fig. 1) just prior to the timeits type bar reaches the extent of its downward movement, as when nocarry over is to be effected, or the continued movement of said rackwith its type bar (Fig. 2) in the event said rack is to carry one intothe accumulator wheel of the higher order. Said control is accomplishedby a laterally extending stop lug- 445 struck from the slide 443 andwhich is either disposed in the path of the shoulder 44!? on the higherorder accumulator rack to arrest the same at zero position, or which isremoved from said path upon the operation of the slide 443 when a carryover operation is to be accomplished.

Said slide 443 is operated either by a high tooth on the subtractingwheel 343 of the accumulator I92 engaging the projection 44! at theinner end of the slide, or by a high tooth on the adding wheel 344contacting the projection 448 of said slide. In either event, the slideis forced outwardly against the tension of its spring 444 and when thisoccurs a normally tensioned leaf spring 449 carried on a verticallymovable frame 450 engages the extremity of the projection 45I on saidslide to retain the same in its operated position. When the slide isthus adjusted, its lug 445 will be out of the path of the shoulder 446of the descending accumulator rack carried by the type bar of the nexthigher order and said rack will therefore travel with said bar to theextent of downward movement of the latter and thus accomplish the carryover into the accumulator wheel engaged with said higher order rack,whereupon the accumulator I92 is retract ed, as described in saidpending application preparatory to the next upward movement of the typebar. Before the type bar again starts its upward movement in the nextcycle of operation, a cam 452 on the shaft operates a follower 453mounted on the shaft M2 and connected to a link 454 which is joined tothe rock shaft 455 by a crank 456. Said shaft 455 is connected by thecranks 451 to links 458 (only one of said connections being shown)pivoted to the lower end of the vertically movable frame 450, andthrough the foregoing connections said cam elevates the frame. When thisoccurs, a common restoring plate 459 for the accumulator racks of thecarry over unit and mounted on the frame 450, moves upwardly to engagethe shoulders 460 of any of the accumulator racks 366 which have beenmoved downwardly to carry over position. Said engagement raises saidracks from the position of Fig. 2 to their zero positions shown inFig. 1. At the same time, the springs 449 of the operated slides 443 arecarried upwardly with the frame 450 and are thus disengaged from theextremities of the projections 45!, allowing the spring 444 to restoresaid slides inwardly so that their lugs 545 will again be positionedbeneath the shoulders 446 of the racks to thus retain them in zeroposition in which they must be in the event that a total-taking cycle isinitiated and the accumulator wheels are thrown into mesh with theirracks before the type bars start upwardly. As soon as the slides 453have been restored, the cam 452 permits the frame 450 to move downwardlyunder the influence of the springs 56i connected to the cranks 451.

Means are provided for splitting the. accumu- V lators and therebydisabling the carry over mechanisms at any desired point or points. Forthis purpose, the stationary frame 442 has mounted thereon an interposer562 for each accumulator rack. Each interposer is manually slidable fromits normally inoperative position shown in Fig. 1 to an inward operativeposition wherein it is frictionally held by a spring 462a with its innerend disposed in the path of the shoulder 463 on the associatedaccumulator rack so as to arrest the downward movement of said rack atits zero position and thus prevent it from accomplishing a carry overoperation into the accumulator of the next higher order.

What is claimed is:

1. In a tabulator, the combination with a plurality of type bars eachhaving a relatively movable accumulator rack, and an accumulator elementassociated with each type bar and provided with a wheel having a hightooth; of a carry over mechanism comprising a stationary frame extendinglaterally to one side of and adjacent said type bars, a slide member foreach accumulator rack having anormal position relative thereto andmounted in the said frame for sliding movement from its normal positiontransverse to said rack with one end of said member having a projectionadapted for contact by the high tooth of an associated accumulator wheelto move said slide member, the latter further having a second projectionstruck laterally therefrom for positioning in the path of an accumulatorrack of the type bar of the next higher order and movable wth said slidemember out of said path when said member is moved by said high tooth,and said slide member further having 'a latching projection formedthereon, a second frame movable relative to said stationary frame, and aspring latching element carried by said movable frame and biased byengagement with said latching projection when said slide is in normalposition and also engageable with said projection, after said member hasbeen moved, to latch the same against its return to normal until saidmovable frame is moved.

2. In a tabulator, the combination of a plurality of type bars eachhaving a relatively movable accumulator rack, and an accumulator elementassociated with each type bar and provided with a wheel having a vhightooth; of a carry over device comprising a single plate associated witheach type bar and its accumulator rack and slidably mounted for movementtransverse to that of said rack from a normal arresting position to anoperated position relative thereto, said plate having one end disposedcontiguous to the teeth of said rack in the normal position of saidplate and being formed integrally at said end with a projection engagedby the high tooth of the associated accumulator wheel for sliding saidplate to its operated position, said plate also having a lug strucklaterally therefrom in arresting position relative to the accumulatorrack of the type bar of the next higher order only when said plate is inits normal position, and means to releasably retain said platein' itsoperated position.

3. In a tabulator, the combination of a plurality of type bars eachhaving a relatively movable accumulator rack, and-an accumulator elementassociated with each type bar and provided with a wheel having a hightooth; of a carry over device comprising a single plate associated witheach type bar and its accumulator rack and slidably mounted for movementtransverse to that of said rack from a normal arresting position to anoperated position relative thereto, said plate having one end disposedcontiguous to the teeth of said rack in the normal position of saidplate and being formed integrally at said end with a projection engagedby the high tooth of the associated accumulator wheel for sliding saidplate to its operated position, said plate also having 3, lug strucklaterally therefrom in arresting position relative to the accumulatorrack of the type bar of the next higher order only when said plate is inits normal position, said plate further being formed with a secondprojection, and a leaf spring mounted independently of said plate andengageable with said second projection when said plate is moved tooperated position to releasably retain same in said position.

WILLIAM WOCKENFUSS.

(,0 REFERENCES CITED The following references are of record in the fileof this patent:

UNITED STATES PATENTS 55 Number Name Date 996,260 Kilpatrick June 27,1911 1,016,278 Kilpatrick Feb. 6, 1912 1,039,783 Muzzy Oct. 1, 19121,94%,675 Fauschek Jan. 23, 1934 so 2,091,758 Hogfors Aug. 31, 19372,128,403 Dahlberg Aug. 30, 1938 2,178,272 Vigborg Oct. 31, 19382,307,105 Brand June 5, 1943

